ABSTRACT
Consider the problem of making a domestic kitchen pan. The basic functions of a domestic kitchen pan may be deemed to be to hold liquid and allow it to be heated to temperatures of the order of 100°C. From a consideration of the function we can arrive at the basic design requirements. Thus, a consequence of these functions for the pan are the requirements for a particular shape of container which must not deform when heated to these temperatures. It must be a good conductor of heat. It must be leak proof. It must not ignite when in contact with a flame or hot electrical element. In addition there may be other requirement which are not so essential, but certainly desirable. For the pan we might thus require an attractive surface finish.
